Smooth Scrolling Container.js

var scrollSpeed = 0;
var isScrolling = false;

document.addEventListener('keydown', function(e) {
  if (sidebar.classList.contains('open')) {

	if (e.shiftKey && e.keyCode === 38) {
	  
	  scrollSpeed *= 1.5; 
	  scrollSpeed = Math.min(Math.max(scrollSpeed, -10), -1);
	  if (!isScrolling) {
		isScrolling = requestAnimationFrame(scroll);
	  }
	}
	if (e.shiftKey && e.keyCode === 40) {
	 if (Math.abs(scrollSpeed) < 1) scrollSpeed = 1;
		scrollSpeed *= 1.5; 
		scrollSpeed = Math.min(Math.max(scrollSpeed, 1), 10);
		console.log(scrollSpeed)
	  if (!isScrolling) {
		isScrolling = requestAnimationFrame(scroll);
	  }
	}
  }
});

function scroll() {
  if (sidebar.classList.contains('open')) {
	if (Math.abs(scrollSpeed) > 0.1) {
	  sidebar.scrollTop += scrollSpeed;
	  scrollSpeed *= 0.95;
	  isScrolling = requestAnimationFrame(scroll);
	} else {
	scrollSpeed=0;
	  isScrolling = null;
	}
  }
}